Silica Content of a Mesohaline Tidal Marsh in North Carolina

Norris, A.R.; Hackney, Courtney T.

doi:10.1006/ecss.1999.0506

Cited by 53 publications

(50 citation statements)

References 24 publications

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“…The DSi concentration in the freshwater marsh porewater was highest in summer and lowest in winter. A similar trend was reported in North Carolina for a mesohaline tidal marsh (Norris & Hackney 1999). Dissolution of BSi in the porewater is enhanced by higher temperature and bacterial activity.…”

Section: Discussionsupporting

confidence: 83%

“…BSi in marsh sediments is mostly attributable to BSi imported during flooding, BSi produced by benthic autochthonous marsh diatoms, and plant phytoliths buried after plant decay. BSi concentrations measured in the upper 10 cm of the freshwater marsh sediments were comparable to BSi measured at a mesohaline tidal marsh in North Carolina (USA) (Norris & Hackney 1999). However, the total amounts of BSi stored in the freshwater marsh sediments were much higher than those in the mesohaline tidal marsh (597 vs. 82 g m -2 in the upper 10 cm), because of higher bulk density of the sediment in our study site.…”

Section: Discussionsupporting

confidence: 65%

“…The only comparable tidal marsh study was conducted in a mesohaline tidal marsh in North Carolina (Norris & Hackney 1999). The amount of BSi stored in the upper 10 cm in our study was high compared to that in the mesohaline marsh study (597 vs. 82 g m -2 ), and in the Phragmites australis vegetation, the BSi content was about 10-fold greater than the content of the mesohaline Juncus roemerianus and Spartina alterniflora vegetation (85 vs. 7.1 g m -2…”

Section: Discussionmentioning

confidence: 99%

“…Resale or republication not permitted without written consent of the publisher reservoirs of silica (Norris & Hackney 1999). Moreover, it was shown how a freshwater marsh (Schelde estuary, Belgium) acted as an important DSi recycler in the estuarine environment .…”

Section: Abstract: Biogenic Silica · Freshwater Marsh · Estuary · Phmentioning

confidence: 99%

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Biogenic silica in tidal freshwater marsh sediments and vegetation (Schelde estuary, Belgium)

Struyf¹,

Damme²,

Gribsholt³

et al. 2005

Mar. Ecol. Prog. Ser.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Abstract: Biogenic Silica · Freshwater Marsh · Estuary · Phmentioning

confidence: 99%

See 2 more Smart Citations

Biogenic silica in tidal freshwater marsh sediments and vegetation (Schelde estuary, Belgium)

Struyf¹,

Damme²,

Gribsholt³

et al. 2005

Mar. Ecol. Prog. Ser.

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“…Macrophytes are another factor in autochthonous production of BSi; aquatic and wetland plants can contain significant amounts of BSi (Schoelynck et al 2010). In freshwater marshes, Phragmites australis is particularly rich in BSi (Struyf et al 2007b; up to 5% of the dry biomass in dead reed culms is BSi in saltwater and mesohaline marshes, the dry biomass of Spartina alterniflora and Juncus roemerianus contains up to ±0.5% of BSi (Norris and Hackney 1999;Querné et al 2012). The relative contribution of autochthonous production vs. tidal import to the total BSi stock in tidal marshes certainly warrants further investigation.…”

Section: Fluxes Of Silicamentioning

confidence: 99%

Fluxes of water, sediments, and biogeochemical compounds in salt marshes

et al. 2013

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Tidal oscillations systematically flood salt marshes, transporting water, sediments, organic matter, and biogeochemical elements such as silica. Here we present a review of recent studies on these fluxes and their effects on both ecosystem functioning and morphological evolution of salt marshes. We reexamine a simplified model for the computation of water fluxes in salt marshes that captures the asymmetry in discharge between flood and ebb. We discuss the role of storm conditions on sediment fluxes both in tidal channels and on the marsh platform. We present recent methods and field instruments for the measurement of fluxes of organic matter. These methods will provide long-term data sets with fine temporal resolution that will help scientists to close the carbon budget in salt marshes. Finally, the main processes controlling fluxes of biogenic and dissolved silica in salt marshes are explained, with particular emphasis on the uptake by marsh macrophytes and diatoms.

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Biogenic silica: a neglected component of the coupled global continental biogeochemical cycles of carbon and silicon

Street-Perrott

Barker

2008

Earth Surf Processes Landf

203

140

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On geological time-scales (≥ ≥ ≥ ≥ ≥10 6 years), the global geochemical cycles of carbon and silicon are coupled by the drawdown of atmospheric CO 2 through chemical weathering of Ca-and Mg-silicate minerals in continental rocks. Rivers transport the soluble products of weathering (cations, alkalinity and silicic acid) to the oceans, where they are utilized by marine ecosystems. On decadal to glacial-interglacial time-scales, however, large biotic fluxes and storages of Si within terrestrial and freshwater ecosystems need to be taken into account. Recent studies have emphasized the importance of Si-accumulating plants, which deposit significant amounts of amorphous hydrated silica in their tissues as opal phytoliths. These include grasses, sedges, palms, some temperate deciduous trees and conifers, and many tropical hardwoods. Landscapes dominated by accumulator plants, such as tropical rainforests, grasslands, herbaceous wetlands and bamboo forests, act as 'silica factories'. Important 'silica bioengineers' in freshwater ecosystems comprise diatoms, sponges and chrysophytes. This paper reviews the biological role of Si in higher plants, the impact of vegetation on rates of chemical weathering, the fluxes of Si through catchment ecosystems, lakes and rivers, and the potential contribution of new geochemical and isotopic tracers to Si biogeochemistry. Multiproxy investigations of lake sediments will provide novel insights into past variations in Si biocycling from terrestrial to aquatic realms on 10-10 6 year time-scales.

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Silica Content of a Mesohaline Tidal Marsh in North Carolina

Cited by 53 publications

References 24 publications

Biogenic silica in tidal freshwater marsh sediments and vegetation (Schelde estuary, Belgium)

Biogenic silica in tidal freshwater marsh sediments and vegetation (Schelde estuary, Belgium)

Fluxes of water, sediments, and biogeochemical compounds in salt marshes

Biogenic silica: a neglected component of the coupled global continental biogeochemical cycles of carbon and silicon

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